display stp active (All views)

Function

The display stp active command displays the status of and statistics on spanning trees of all Up interfaces.

Format

display stp active

Parameters

None

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
mstp	read

Usage Guidelines

Usage Scenario

To view information about spanning trees on all Up interfaces, run the display stp active command.

Precautions

In a multi-instance scenario, a PW interface's STP state does not take effect for any MSTP instance with a non-0 ID. For such an instance, its actual STP state is the same as instance 0's STP state.

The actual STP state of an interface bound to a process in link-share mode is the same as that of the interface bound to a process in no-link-share mode.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display information about spanning trees on all Up interfaces.

<HUAWEI> display stp active
-------[CIST Global Info][Mode MSTP]-------                                     
CIST Bridge         :61440.00e0-fc12-3456                                       
Config Times        :Hello 2s MaxAge 20s FwDly 15s MaxHop 20                    
Active Times        :Hello 2s MaxAge 20s FwDly 15s MaxHop 20                    
CIST Root/ERPC      :61440.00e0-fc12-3456 / 0                                   
CIST RegRoot/IRPC   :61440.00e0-fc12-3456 / 0                                   
CIST RootPortId     :0.0                                                        
BPDU-Protection     :Disabled                                                   
TC or TCN received  :85                                                         
TC count per hello  :0                                                          
STP Converge Mode   :Normal                                                     
Time since last TC  :0 days 9h:10m:8s
Number of TC        :13                                                         
Last TC occurred    :GigabitEthernet0/1/4                                       
----[Port18(GigabitEthernet0/1/1)][FORWARDING]----                             
 Port Protocol       :Enabled                                                   
 Port Role           :Designated Port                                           
 Port Priority       :128                                                       
 Port Cost(Dot1T )   :Config=auto / Active=20000                                
 Designated Bridge/Port   :61440.00e0-fc12-3456 / 128.18                        
 Port Edged          :Config=default / Active=enabled                           
 Point-to-point      :Config=auto / Active=true                                 
 Transit Limit       :10 packets/s                                              
 Protection Type     :None                                                      
 Port STP Mode       :MSTP                                                      
 Port Protocol Type  :Config=auto / Active=dot1s                                
 BPDU Encapsulation  :Config=stp / Active=stp                                   
 PortTimes           :Hello 2s MaxAge 20s FwDly 15s RemHop 20                   
 TC or TCN send      :5                                                         
 TC or TCN received  :0                                                         
 BPDU Sent           :178445                                                    
          TCN: 0, Config: 0, RST: 0, MST: 178445                                
 BPDU Received       :0                                                         
          TCN: 0, Config: 0, RST: 0, MST: 0                                     
 Last forwarding time: 2012/04/19 16:58:37 UTC+08:00                            
----[Port19(GigabitEthernet0/1/9)][FORWARDING]----                             
 Port Protocol       :Enabled                                                   
 Port Role           :Designated Port                                           
 Port Priority       :128                                                       
 Port Cost(Dot1T )   :Config=auto / Active=20000                                
 Designated Bridge/Port   :61440.00e0-fc12-3456 / 128.19                        
 Port Edged          :Config=default / Active=enabled                           
 Point-to-point      :Config=auto / Active=true                                 
 Transit Limit       :10 packets/s                                              
 Protection Type     :None                                                      
 Port STP Mode       :MSTP                                                      
 Port Protocol Type  :Config=auto / Active=dot1s                                
 BPDU Encapsulation  :Config=stp / Active=stp                                   
 PortTimes           :Hello 2s MaxAge 20s FwDly 15s RemHop 20                   
 TC or TCN send      :0                                                         
 TC or TCN received  :0                                                         
 BPDU Sent           :5                                                         
          TCN: 0, Config: 0, RST: 0, MST: 5                                     
 BPDU Received       :0                                                         
          TCN: 0, Config: 0, RST: 0, MST: 0                                     
 Last forwarding time: 2012/04/23 20:06:08 UTC+08:00                            
                                                                                
-------[MSTI 1 Global Info]-------                                              
MSTI Bridge ID      :61440.00e0-fc12-3456                                       
MSTI RegRoot/IRPC   :61440.00e0-fc12-3456 / 0
MSTI RootPortId     :0.0                                                        
Master Bridge       :61440.00e0-fc12-3456                                       
Cost to Master      :0                                                          
TC received         :2                                                          
TC count per hello  :0                                                          
Time since last TC  :0 days 9h:10m:8s                                           
Number of TC        :9                                                          
Last TC occurred    :GigabitEthernet0/1/4

**Table 1** Description of the **display stp active (All views)** command output
Item	Description
CIST Bridge	CIST bridge ID: The first 16 bits represent the priority of the device in the CIST. The last 48 bits are the MAC address of the device.
CIST Root/ERPC	CIST root device ID/Cost of the external path (path from the local device to the CIST root device).
CIST RegRoot/IRPC	ID of the CIST region root bridge/Cost of the internal path (path from the local device to the CIST region root bridge).
CIST RootPortId	ID of the CIST root port. "0.0" indicates that the device is a root device and does not have a root port.
Mode	STP mode: STP. RSTP. MSTP.
Config Times	Time value in the manually configured bridge protocol information: Hello: interval for sending BPDUs. MaxAge: the maximum lifetime of a BPDU. FwDly: delay in interface status transition. MaxHop: the maximum number of hops in the MST region.
Active Times	Time value in the bridge protocol information that is actually used: Hello: interval for sending BPDUs. MaxAge: the maximum lifetime of a BPDU. FwDly: delay in interface status transition. MaxHop: the maximum number of hops in the MST region.
BPDU-Protection	BPDU protection: disabled: BPDU protection is disabled. enabled: BPDU protection is enabled.
TC or TCN received	Number of received TC or TCN packets.
TC count per hello	Number of TC packets received per Hello time.
TC or TCN send	Number of TC or TCN BPDUs sent on the interface.
TC received	Number of received TC BPDUs.
STP Converge Mode	STP converge mode. There are two convergence modes: fast and normal.
Time since last TC	Time since the last topology change.
Number of TC	Number of topology changes.
Port Protocol	Whether STP is enabled on the interface: Enable: STP is enabled on the interface. Disable: STP is disabled on the interface.
Port Role	Role of the port. In the CIST region, four port roles are available: Root Port. Designated Port. Alternate Port. Backup Port.
Port Priority	Interface priority. For details on how to configure the interface priority, see stp port priority.
Port Edged	Edge port (specified by the administrator). enabled: The edge port is enabled. disabled: The edge port is disabled. Config indicates the value configured using the stp edged-port command, and Active indicates the actual value.
Port STP Mode	STP mode of the interface.
Port Protocol Type	Format of BPDUs sent and received on the interface, which can be: The options are as follows: auto. legacy. dot1s. The default value is auto. Config: indicates that the item passes the check. Packet format configured using the stp compliance command. Active indicates the actual packet format.
Designated Bridge/Port	ID of the device and ID of the designated port. The first 16 bits of the device ID indicate the priority of the device in the CIST, and the last 48 bits indicate the MAC address of the device. The first 4 bits of the port ID indicate the priority, and the last 12 bits indicate the port number.
Point-to-point	Link type of the port. Config indicates the link type configured using the stp point-to-point command, and Active indicates the actual link type.
Transit Limit	Maximum number of BPDUs sent by the port per second. For details, see stp transmit-limit.
Protection Type	Protection type, which can be: root-protection: takes effect only on the specified interface. loop-protection: takes effect only on the root port or alternate port.
BPDU Encapsulation	Format of BPDUs that are sent and received on the interface. The options are as follows: stp.
BPDU Sent	Statistics about sent BPDUs: TCN: TCN packet. Config: STP packet. RST: RSTP packet. MST: MSTP packet.
BPDU Received	Statistics on received BPDUs.
MSTI Bridge ID	MSTI bridge ID.
MSTI RegRoot/IRPC	ID of the MSTI root bridge/Cost of the internal path (path from the local device to the MSTI root bridge).
MSTI RootPortId	ID of the MSTI root interface. "0.0" indicates that the device is a root device and does not have a root port.
Master Bridge	ID of the bridge where the master interface is located. The first 16 bits represent the priority of the device in the CIST. The last 48 bits are the MAC address of the device.
Cost to Master	Cost of the path from the local device to the bridge where the master interface is located. 0 indicates that the master interface is located at the current bridge.
Last TC occurred	Displays the port that causes the last network topology change. This line is not displayed if Number of TC is 0.
Last forwarding time	Time when the interface last entered the forwarding state.
PortTimes/Port Times	Time value in the bridge protocol information of the port. Hello: interval for sending BPDUs. MaxAge: the maximum lifetime of a BPDU. FwDly: delay in interface status transition. RemHop: the maximum number of hops in the MST region.